import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/login.vue'
import Home from '../components/home.vue'

Vue.use(VueRouter)

const routes = [
  {
    path: '',
    redirect: '/login'
  },
  {
    path: '/login',
    name: Login,
    component: Login
  },
  {
    path: '/home',
    name: Home,
    component: Home
  }
]

const router = new VueRouter({
  routes,
  mode: 'history'
})
// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to将要访问的路径
  // from代表将从那里访问
  // next是一个函数  代表放行
  //  next（）放行  next('/login')强制跳转
  if (to.path === '/login') return next()
  // 获取token
  const token = window.sessionStorage.getItem('token')
  if (!token) return next('/login')
  next()
})

export default router
